;
(function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        define(factory);
    } else if (typeof exports === 'object') {
        module.exports = factory();
    } else {
        root.NProgress = factory();
    }
})(this, function () {
    var NProgress = {};
    NProgress.version = '0.2.0';
    var Settings = NProgress.settings = {
        minimum: 0.08,
        easing: 'ease',
        positionUsing: '',
        speed: 200,
        trickle: true,
        trickleRate: 0.02,
        trickleSpeed: 800,
        showSpinner: true,
        barSelector: '[role="bar"]',
        spinnerSelector: '[role="spinner"]',
        parent: 'body',
        template: '<div class="bar" role="bar"><div class="peg"></div></div><div class="spinner" role="spinner"><div class="spinner-icon"></div></div>'
    };
    NProgress.configure = function (options) {
        var key, value;
        for (key in options) {
            value = options[key];
            if (value !== undefined && options.hasOwnProperty(key)) Settings[key] = value;
        }
        return this;
    };
    NProgress.status = null;
    NProgress.set = function (n) {
        var started = NProgress.isStarted();
        n = clamp(n, Settings.minimum, 1);
        NProgress.status = (n === 1 ? null : n);
        var progress = NProgress.render(!started),
            bar = progress.querySelector(Settings.barSelector),
            speed = Settings.speed,
            ease = Settings.easing;
        progress.offsetWidth;
        queue(function (next) {
            if (Settings.positionUsing === '') Settings.positionUsing = NProgress.getPositioningCSS();
            css(bar, barPositionCSS(n, speed, ease));
            if (n === 1) {
                css(progress, {
                    transition: 'none',
                    opacity: 1
                });
                progress.offsetWidth;
                setTimeout(function () {
                    css(progress, {
                        transition: 'all ' + speed + 'ms linear',
                        opacity: 0
                    });
                    setTimeout(function () {
                        NProgress.remove();
                        next();
                    }, speed);
                }, speed);
            } else {
                setTimeout(next, speed);
            }
        });
        return this;
    };
    NProgress.isStarted = function () {
        return typeof NProgress.status === 'number';
    };
    NProgress.start = function () {
        if (!NProgress.status) NProgress.set(0);
        var work = function () {
            setTimeout(function () {
                if (!NProgress.status) return;
                NProgress.trickle();
                work();
            }, Settings.trickleSpeed);
        };
        if (Settings.trickle) work();
        return this;
    };
    NProgress.done = function (force) {
        if (!force && !NProgress.status) return this;
        return NProgress.inc(0.3 + 0.5 * Math.random()).set(1);
    };
    NProgress.inc = function (amount) {
        var n = NProgress.status;
        if (!n) {
            return NProgress.start();
        } else {
            if (typeof amount !== 'number') {
                amount = (1 - n) * clamp(Math.random() * n, 0.1, 0.95);
            }
            n = clamp(n + amount, 0, 0.994);
            return NProgress.set(n);
        }
    };
    NProgress.trickle = function () {
        return NProgress.inc(Math.random() * Settings.trickleRate);
    };
    (function () {
        var initial = 0,
            current = 0;
        NProgress.promise = function ($promise) {
            if (!$promise || $promise.state() === "resolved") {
                return this;
            }
            if (current === 0) {
                NProgress.start();
            }
            initial++;
            current++;
            $promise.always(function () {
                current--;
                if (current === 0) {
                    initial = 0;
                    NProgress.done();
                } else {
                    NProgress.set((initial - current) / initial);
                }
            });
            return this;
        };
    })();
    NProgress.render = function (fromStart) {
        if (NProgress.isRendered()) return document.getElementById('nprogress');
        addClass(document.documentElement, 'nprogress-busy');
        var bodyh = document.querySelector("body");
        var progress = document.createElement('div');
        bodyh.appendChild(progress);
        progress.id = 'nprogress';
        progress.innerHTML = Settings.template;
        var bar = progress.querySelector(Settings.barSelector),
            perc = fromStart ? '-100' : toBarPerc(NProgress.status || 0),
            parent = document.querySelector(Settings.parent),
            spinner;
        css(bar, {
            transition: 'all 0 linear',
            transform: 'translate3d(' + perc + '%,0,0)'
        });
        if (!Settings.showSpinner) {
            spinner = progress.querySelector(Settings.spinnerSelector);
            spinner && removeElement(spinner);
        }
        if (parent != document.body) {
            addClass(parent, 'nprogress-custom-parent');
        }
        parent.appendChild(progress);
        return progress;
    };
    NProgress.remove = function () {
        removeClass(document.documentElement, 'nprogress-busy');
        removeClass(document.querySelector(Settings.parent), 'nprogress-custom-parent');
        var progress = document.getElementById('nprogress');
        progress && removeElement(progress);
    };
    NProgress.isRendered = function () {
        return !!document.getElementById('nprogress');
    };
    NProgress.getPositioningCSS = function () {
        var bodyStyle = document.body.style;
        var vendorPrefix = ('WebkitTransform' in bodyStyle) ? 'Webkit' : ('MozTransform' in bodyStyle) ? 'Moz' : ('msTransform' in bodyStyle) ? 'ms' : ('OTransform' in bodyStyle) ? 'O' : '';
        if (vendorPrefix + 'Perspective' in bodyStyle) {
            return 'translate3d';
        } else if (vendorPrefix + 'Transform' in bodyStyle) {
            return 'translate';
        } else {
            return 'margin';
        }
    };

    function clamp(n, min, max) {
        if (n < min) return min;
        if (n > max) return max;
        return n;
    }

    function toBarPerc(n) {
        return (-1 + n) * 100;
    }

    function barPositionCSS(n, speed, ease) {
        var barCSS;
        if (Settings.positionUsing === 'translate3d') {
            barCSS = {
                transform: 'translate3d(' + toBarPerc(n) + '%,0,0)'
            };
        } else if (Settings.positionUsing === 'translate') {
            barCSS = {
                transform: 'translate(' + toBarPerc(n) + '%,0)'
            };
        } else {
            barCSS = {
                'margin-left': toBarPerc(n) + '%'
            };
        }
        barCSS.transition = 'all ' + speed + 'ms ' + ease;
        return barCSS;
    }
    var queue = (function () {
        var pending = [];

        function next() {
            var fn = pending.shift();
            if (fn) {
                fn(next);
            }
        }
        return function (fn) {
            pending.push(fn);
            if (pending.length == 1) next();
        };
    })();
    var css = (function () {
        var cssPrefixes = ['Webkit', 'O', 'Moz', 'ms'],
            cssProps = {};

        function camelCase(string) {
            return string.replace(/^-ms-/, 'ms-').replace(/-([\da-z])/gi, function (match, letter) {
                return letter.toUpperCase();
            });
        }

        function getVendorProp(name) {
            var style = document.body.style;
            if (name in style) return name;
            var i = cssPrefixes.length,
                capName = name.charAt(0).toUpperCase() + name.slice(1),
                vendorName;
            while (i--) {
                vendorName = cssPrefixes[i] + capName;
                if (vendorName in style) return vendorName;
            }
            return name;
        }

        function getStyleProp(name) {
            name = camelCase(name);
            return cssProps[name] || (cssProps[name] = getVendorProp(name));
        }

        function applyCss(element, prop, value) {
            prop = getStyleProp(prop);
            element.style[prop] = value;
        }
        return function (element, properties) {
            var args = arguments,
                prop, value;
            if (args.length == 2) {
                for (prop in properties) {
                    value = properties[prop];
                    if (value !== undefined && properties.hasOwnProperty(prop)) applyCss(element, prop, value);
                }
            } else {
                applyCss(element, args[1], args[2]);
            }
        }
    })();

    function hasClass(element, name) {
        var list = typeof element == 'string' ? element : classList(element);
        return list.indexOf(' ' + name + ' ') >= 0;
    }

    function addClass(element, name) {
        var oldList = classList(element),
            newList = oldList + name;
        if (hasClass(oldList, name)) return;
        element.className = newList.substring(1);
    }

    function removeClass(element, name) {
        var oldList = classList(element),
            newList;
        if (!hasClass(element, name)) return;
        newList = oldList.replace(' ' + name + ' ', ' ');
        element.className = newList.substring(1, newList.length - 1);
    }

    function classList(element) {
        return (' ' + (element.className || '') + ' ').replace(/\s+/gi, ' ');
    }

    function removeElement(element) {
        element && element.parentNode && element.parentNode.removeChild(element);
    }
    return NProgress;
});